Deratil bin Boaklan   <br/><br/>
Study of some soils from Sabah, Malaysia, derived from ultrabasic igneous rock with reference to topography  (Book) 

 - Ghent  State University of Ghent  1979 
 - 58, vi p.  29 cm. 
<br/><br/><label>Universal Decimal Class. No.: </label>631.445.7:553.52(043) DER  / 5383